I currently have 4/100 watt Renogy panels using the ecoflow D2 in series/parallel-running 24/7-} a full size fridge and a small freezer. I was getting approx 310 watts input with the unit @20 ft with a 10awg xt60i cable and a 20 ft 12awg extension with mc4's. The volts drop where 1.69%. I've move the panels to a sunnyier location for the (winter) that's now 60ft on a 12 awg extension with a 20ft 10 awg xt60i. My input wattage has dropped to a flucating 70-102 watts in the shade and in full sun, it remains there. The online voltage calculator adds a volt drop of 4.27%, Where did I go wrong? Im thinking (wife says not too, and Oh Lord, LOL), adding a 5th panel and a 8awg 50 ft extension in series/parallel. We've also had a tempature drop as well, 74F+ to 31F at night, to a high of 50F. Thoughts?